Commit | Line | Data |
---|---|---|
570a0bb8 LPC |
1 | /* |
2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> | |
3 | * JZ4740 SoC clock support debugfs entries | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | * | |
10 | * You should have received a copy of the GNU General Public License along | |
11 | * with this program; if not, write to the Free Software Foundation, Inc., | |
12 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/clk.h> | |
19 | #include <linux/err.h> | |
20 | ||
21 | #include <linux/debugfs.h> | |
22 | #include <linux/uaccess.h> | |
23 | ||
24 | #include <asm/mach-jz4740/clock.h> | |
25 | #include "clock.h" | |
26 | ||
27 | static struct dentry *jz4740_clock_debugfs; | |
28 | ||
29 | static int jz4740_clock_debugfs_show_enabled(void *data, uint64_t *value) | |
30 | { | |
31 | struct clk *clk = data; | |
32 | *value = clk_is_enabled(clk); | |
33 | ||
34 | return 0; | |
35 | } | |
36 | ||
37 | static int jz4740_clock_debugfs_set_enabled(void *data, uint64_t value) | |
38 | { | |
39 | struct clk *clk = data; | |
40 | ||
41 | if (value) | |
42 | return clk_enable(clk); | |
43 | else | |
44 | clk_disable(clk); | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | DEFINE_SIMPLE_ATTRIBUTE(jz4740_clock_debugfs_ops_enabled, | |
50 | jz4740_clock_debugfs_show_enabled, | |
51 | jz4740_clock_debugfs_set_enabled, | |
52 | "%llu\n"); | |
53 | ||
54 | static int jz4740_clock_debugfs_show_rate(void *data, uint64_t *value) | |
55 | { | |
56 | struct clk *clk = data; | |
57 | *value = clk_get_rate(clk); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | DEFINE_SIMPLE_ATTRIBUTE(jz4740_clock_debugfs_ops_rate, | |
63 | jz4740_clock_debugfs_show_rate, | |
64 | NULL, | |
65 | "%llu\n"); | |
66 | ||
67 | void jz4740_clock_debugfs_add_clk(struct clk *clk) | |
68 | { | |
69 | if (!jz4740_clock_debugfs) | |
70 | return; | |
71 | ||
72 | clk->debugfs_entry = debugfs_create_dir(clk->name, jz4740_clock_debugfs); | |
73 | debugfs_create_file("rate", S_IWUGO | S_IRUGO, clk->debugfs_entry, clk, | |
74 | &jz4740_clock_debugfs_ops_rate); | |
75 | debugfs_create_file("enabled", S_IRUGO, clk->debugfs_entry, clk, | |
76 | &jz4740_clock_debugfs_ops_enabled); | |
77 | ||
78 | if (clk->parent) { | |
79 | char parent_path[100]; | |
80 | snprintf(parent_path, 100, "../%s", clk->parent->name); | |
81 | clk->debugfs_parent_entry = debugfs_create_symlink("parent", | |
82 | clk->debugfs_entry, | |
83 | parent_path); | |
84 | } | |
85 | } | |
86 | ||
87 | /* TODO: Locking */ | |
88 | void jz4740_clock_debugfs_update_parent(struct clk *clk) | |
89 | { | |
90 | if (clk->debugfs_parent_entry) | |
91 | debugfs_remove(clk->debugfs_parent_entry); | |
92 | ||
93 | if (clk->parent) { | |
94 | char parent_path[100]; | |
95 | snprintf(parent_path, 100, "../%s", clk->parent->name); | |
96 | clk->debugfs_parent_entry = debugfs_create_symlink("parent", | |
97 | clk->debugfs_entry, | |
98 | parent_path); | |
99 | } else { | |
100 | clk->debugfs_parent_entry = NULL; | |
101 | } | |
102 | } | |
103 | ||
104 | void jz4740_clock_debugfs_init(void) | |
105 | { | |
106 | jz4740_clock_debugfs = debugfs_create_dir("jz4740-clock", NULL); | |
107 | if (IS_ERR(jz4740_clock_debugfs)) | |
108 | jz4740_clock_debugfs = NULL; | |
109 | } |